I guess a level 15 Ariados isn't completely out of the question if you really wanted to use one, though I don't think it puts it any higher than say, Beedrill from the Bug Catching contest, which can be caught at around the same level (12-15). What do you think about this for Spinarak's summary then? Spinarak Ariados be caught as a decent level 15 in Crystal right before Ecruteak City, but it is still extremely weak in battle until gaining the Sludge Bomb TM much later. Even with Sludge Bomb, its low speed makes it tricky to raise and battle efficiently, and its only other viable attacks are Return and Dig. Also, since you mentioned Butterfree: Caterpie Though it can be caught fully evolved, Butterfree is stuck with a non-STAB Confusion as its only viable attack until level 34 where it learns Psybeam which is only slightly stronger. Because its attacks are weak and it cannot take hits well, it relies overly on Sleep Powder to stand up to most strong enemies. Overall, a very poor option.